Hi @SathishkumarSingh-0068 ,
Based on my research, Exchange 2016 CU18 has to be installed to address this vulnerability.
https://support.microsoft.com/en-us/topic/cumulative-update-18-for-exchange-server-2016-c1af0ead-3bde-e4db-5f24-9f597050dcbf
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1730
Upgrading Exchange CU
https://learn.microsoft.com/en-us/exchange/plan-and-deploy/install-cumulative-updates?view=exchserver-2019#install-an-exchange-cu-using-the-setup-wizard
Upgrading Exchange CU in DAG
https://practical365.com/exchange-server/installing-cumulative-updates-on-exchange-server-2016/
http://cloudexchangers.com/exchange-runbooks/
Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.
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